CD74HC244EE4 Equivalent & Substitute Parts

Part Overview

The CD74HC244EE4 is an 8-channel, 2V to 6V non-inverting buffer with 3-state output logic integrated circuit manufactured by Texas Instruments. This device functions as a 2-element, 4-bit-per-element buffer in a 20-pin DIP package, designed for through-hole mounting applications. The part is currently in active production status with 935 units available in new original inventory. Substitute parts are necessary when the primary part becomes unavailable, when alternative compliance certifications are required, or when inventory constraints necessitate sourcing from alternative manufacturers while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	20-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Series	74HC

Substitute Part Grouping Explanation

Substitute parts for the CD74HC244EE4 are qualified based on strict parametric equivalence across the following criteria:

Electrical Parameters (Must Match Exactly):

Logic type: Buffer, Non-Inverting
Number of elements: 2
Number of bits per element: 4
Output type: 3-State
Output current specifications: 7.8mA high, 7.8mA low
Supply voltage range: 2V ~ 6V
Operating temperature range: -55°C ~ 125°C

Mechanical Parameters (Must Match Exactly):

Package type: 20-DIP (0.300", 7.62mm)
Mounting type: Through Hole
Series classification: 74HC

All identified substitute parts meet these requirements without exception. Substitution is valid only when all parameters listed above are identical between the main part and the candidate substitute.

Parameter Comparison

Parameter	CD74HC244EE4 (Texas Instruments)	CD74HC241E (Harris Corporation)	CD74HC244E (Texas Instruments)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2
Number of Bits per Element	4	4	4
Output Type	3-State	3-State	3-State
Current - Output High, Low	7.8mA, 7.8mA	7.8mA, 7.8mA	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V
Operating Temperature	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)
Package / Case	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Series	74HC	74HC	74HC
Product Status	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant
Inventory Available	935 Pcs	13861 Pcs	2792 Pcs

Engineering Selection Recommendations

CD74HC244E (Texas Instruments) is the primary substitute for CD74HC244EE4. Both parts are manufactured by Texas Instruments, share identical electrical and mechanical specifications, maintain active product status, and comply with ROHS3 certification. This substitute provides direct functional equivalence with no design modifications required.

CD74HC241E (Harris Corporation) is a parametric equivalent that meets all electrical and mechanical requirements. However, this part carries obsolete product status and does not comply with RoHS standards. Selection of this substitute should be limited to applications where legacy component sourcing is necessary and RoHS compliance is not a design requirement. The significantly higher inventory level (13861 units) may be relevant for high-volume procurement scenarios where other constraints permit its use.

For new designs and applications requiring current compliance certifications, CD74HC244E is the recommended substitute. For legacy system maintenance or repair where RoHS compliance is not mandated, CD74HC241E remains functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can CD74HC244E be used as a direct replacement for CD74HC244EE4?

A: Yes. Both parts are electrically and mechanically identical. They share the same logic type, element configuration, output specifications, supply voltage range, operating temperature range, and 20-DIP package. No circuit modifications are required.

Q: What is the difference between CD74HC244EE4 and CD74HC244E?

A: The parts are functionally equivalent. The primary differences are manufacturer inventory levels (935 units versus 2792 units) and potentially different packaging lot codes. Both maintain active status and ROHS3 compliance.

Q: Is CD74HC241E compatible with CD74HC244EE4?

A: CD74HC241E meets all parametric requirements for electrical and mechanical substitution. However, it carries obsolete product status and does not comply with RoHS standards. Use this substitute only when the primary and secondary options are unavailable and RoHS compliance is not a design constraint.

Q: What parameters must match for a valid substitute?

A: The following parameters must be identical: logic type (Buffer, Non-Inverting), number of elements (2), bits per element (4), output type (3-State), output current (7.8mA high/low), supply voltage (2V ~ 6V), operating temperature (-55°C ~ 125°C), package type (20-DIP), mounting type (Through Hole), and series classification (74HC).

Q: Can these parts be used in surface-mount applications?

A: No. All three parts are specified for through-hole mounting only in 20-DIP packages. Surface-mount alternatives would require different package types and are not included in this equivalence list.

Q: Are there any compliance differences between the substitute parts?

A: Yes. CD74HC244EE4 and CD74HC244E are both ROHS3 compliant. CD74HC241E is not RoHS compliant. For applications requiring RoHS certification, use only CD74HC244EE4 or CD74HC244E.

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